1220553534440 has 16 divisors (see below), whose sum is σ = 2746245452580. Its totient is φ = 488221413760.

The previous prime is 1220553534437. The next prime is 1220553534481. The reversal of 1220553534440 is 444353550221.

It can be written as a sum of positive squares in 2 ways, for example, as 1219553583556 + 999950884 = 1104334^2 + 31622^2 .

It is a super-2 number, since 2×1220553534440² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220553534394 and 1220553534403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15256919141 + ... + 15256919220.

Almost surely, 2^{1220553534440} is an apocalyptic number.

1220553534440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220553534440 is an abundant number, since it is smaller than the sum of its proper divisors (1525691918140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220553534440 is a wasteful number, since it uses less digits than its factorization.

1220553534440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30513838372 (or 30513838368 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 38.

The spelling of 1220553534440 in words is "one trillion, two hundred twenty billion, five hundred fifty-three million, five hundred thirty-four thousand, four hundred forty".